Attachment for roll-over pattern-drawing molding machines



Jan. 19,1926. 1,570,506

W. LEWIS ATTACHMENT FOR ROLL OVER PATTERN DRAWING HOLDINGv HAGHINES Original Filed Nov. 'l 923. Sheetssheet, i'

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Jan. 19 1926. 1,570,506

` w. LEWIS ATTACHMENT FOR ROLL OVER PATTERNv DRAWING MODDING MACHINES Original Filed N0V- 12- 1923 4 ASheets-Sheet 2 zz 2o 25 A TTU/MEV W. LEWIS ATTACHMENT Fox RDLL ovER PATTERN DRAWING Mmmm ncums origfmal Filed Nov. 12. 1923A 4 snetssheet V:s

i wf/fron' Jan. 19 1926. A A

1 W.-l Ew ls ATTACHMENT TOR ROLL OVER PATTERN DRAWING Momma MAcHxNEs Nv. 12. 192s 4 Sheets-Sheet CL E E Eh ,dm-.t m.. \\N O o o o A Q Ulllknl l/V VEN 70H O Chu:

Patented Jan. 19,` 1926. y Q l i i wILrRED LEWIS. 0F H'AvnnronngPENivsYLvAN'rA,' 1

` Armesfmmreaem-etea fitnessruimte"Mammenieuwe;

Appneatitn niet 'evembef '12, 1ae, iseia1jm.` '674,184. Renewed oetoter 1925. V

Te alza/wm may www Be it knownthat I, WILFREDM- citizen 'of -tlieV Urteel-v States, Aresiding at Haverford,- in fthe county of Montgomery and State ofPer-msylvania, have invented a new and usetl Attachment for Rell-Over raaerani-awitg :Mening Maletines, gef

" which the following is-a specification. s

I f be said to comprise an attachment for. T011-,

Y The principal object of the present inventionis to make good mold'aff'al'rd thisV object attained by rvrelie'vi-nge; thetmaehine of the effect of the iinbalan'ced load, con-l sisting' of 'the-i-ask` and' contents, 1p1-ier to p'atternelrawng 'with the flask support properly equ-alizedfaiid'secured. f To this and other ends hereinafter set forth the invention, generally stated,l inay over patternedrawi-ng f moldingv- 'rn'achines comprising 1n f Yc onribmation al" leveling mechanism adapted to receive VAthe flask'and l eontenteand to operate in eppositento the weight thereof, and stop ni'eans for limiting the opposition of the leveling mechanism to the weight of lthe 'and contents,whereby andZ vupon uneoup'lng, the roll-everr meehanisrnis relieved ofv the weightM of the flask and fcontent's and of the effects 'of such necti'on with thefembodinients Vofy itchosen ofa pattern-drawing roll-over molding .ma`V chine and/ offleveling nie'cha-nism having one embodiment fof stop niea'ns andactnating appliances.

Fig 2 is a ldetachedV elevational `viewrof one of the wedgedevicesshownin 'Fignjre'1.

Fig@ is aviewfsimil'ar to Fig. V1, partly ferentlaljpiston and Vcylinder structure is l in -section, illustrating a modification ofthe' i Vother modificationr'offstop rneans for limit-J,` ing the operationg'o'f the leveling Ineehanism.` 50 In the drawings 1 are thefroll-overarms stop means Iand power appliances, jand Figs. 4 and 5 yare elevational views; part'-4 ly in section, showing two po'jsitionsof the roll-overV mechanism `and illastral-iing1@ani` pivoted at 2 'tof afstrnctiire 3 aifordedvershown the arms 1 are connectedfwithathe Lnwfs, a I

pattern platefwtli the' lat-ter, for example-, bymeans fofthe mechanism 7. Asthe sti-nef; ture eentzniesto rise the -op'eratonef the tenements depending from them the flaskL whichf'reinains iipon fthe1's`dpport 8. `It isfcisto'ina'ry tofuse Aa vibrator,` which nder'stood Vto `require f furtherA des' "'iption Ivor illustration, during the -patf terfnfdrawing operation. There is nothingparticlalilyl new 'setf forth in 'the' kforegoing description ywhich` vis given inconnection Y with vone Tof ina/ny'v types of roll-over 'pattern'`v VKdrawingI 'nol'ding machines in .orderthat in l. A -v attachment, which i'snot limited tofu'se in connection with any particular one of ythose lidesepipnen will' new be given eff iefver y'eeneemiwir the flask- A navet-fits. 1

ing'- Inechanism adapted to receive theflask and to operate in Vopposition to the weight 7 A' .tlfrereofV 'Onthe ysupport 8 arefour inclined faces-9,10, 11 and 12.y 'Wedges 13 and 14 I connected in pair byrods 15 ride on these inclined `faces Vand theV connection between the rodsandwedges is'such that the wedges may assumefpsitions in which onejwedge j of a pair-iis nearer to thecentery of the supi* port 8 than the' other wedge of. va pair. In

this'w'ay inequalities `in thejbotto'm board" ofthe flask are compensated lfor andthe flask isffenga-'ged in properv position. .As shown in Fi'gglgfthe rods 15` are each :conw` nected-/to fa handlevefr 16 pivotaL-'lin'ks 17 andi-18, the'lin'kly being extendedjas'at 19 to'aiford agi-nde.V vInthe `'modificatio'n no l means for limiting the operation of the leveling mechanism to the weight of the flask and contents will now be described. Referring to Figs. 1 and 2, the shoulder 23 on the surface 24 upon which the-'lever 16 slides, operates as a stop in the sense that when the lever 16 drops past the shoulder 23 the operator releases the lever 16 having exerted upon it that amount of force which is necessary to balance the weight of the flask and the effect of its release from the arms 1 upon the machine. As shown in Fig. 3, the stop means comprise the headed rods 25 and the yoke 26, it being understood that in the structure shown in Fig. 3 the high parts of the inclines are remote from the support 8 and that the wedges are turned end for end in respectto the position shown in Fig. 2. As shown in Fig. Il, the stop means assume another modification in form. In that figure the` leveling mechanism is mounted on a piston and cylinder structure 27 subjected .to compressed air of which the pressure is limited in such a way that the vweight of the flask and contents is balanced. Although in this construction the wedges may be brought to their limit of travel as fixed by the stop 23, Fig. 2, or 26, Fig. 3, inV order to be sure that the operation of the vibrator may not loosen them, still no more than the weight Vof the flask and contents is taken because anything in excess of -that overcoming thc air pressure in the part 27, depresses the support 8.

In use the wedges first come to an even bearing on the bottom board of the flask and then lift until their action is restrained by the stop means, and this restraint is exercised when the unbalanced weight of the liask and contents has been taken from the arms 1, and in this connection it will be seen that no allowance need be made for the effect of relieving the arms and machine from the unbalanced weight of the flask and contents when the flask is uncoupled. The link 5 is shown as fitted with a spring which balances the Weight of the moving parts with the exception of the flask and contents, and this unbalanced weight is by the described mechanism supported by the wedges or structure to which they are connected, thus when the flask is uncoupled from `the arms relative movement is avoided with Vthe result that the pattern can be drawn The springs B, in the position shown in Fig. i,

the flask when its weight is taken from the arms.

'It is evident in Fig. 1 that the lever 1.6 does not act with equal force and effect upon the cross bars 15 and that this inequality can be compensated when desired by using a slightly greater wedge angle on the rails where the force is greater, but ordinarily there is sufficient stiffness in the swinging frame to take care of this dierence, and when an air cylinder is employed the action and reaction being equal on both cross bars 15, it is evident that the wedge angles should be equaland they are generally made It will be obvious to those skilled in the art that modifications may be made in details of construction and arrangement and mere matters of form without departing from the spirit of the invention `which is not limited to such matters or otherwise than the prior art and the appended claims may require. Y

I claim:

1. An attachment for roll-over *pattern- I drawing molding machines comprising in combination a leveling mechanism adapted to engage the flask and contents and to operate in opposition to the weight thereof.

and stops for limiting the opposition of the leveling mechanism to the weight of the flask and contents, whereby and upon uncoupling, the rollover mechanism is re` lieved of the weight of the flask and contents and of the effect of such release.

2. At attachment for roll-over patterndrawing molding machines comprising` in combination complementary wedges adapted to engage the flask and contents, wedge actuating mechanism adapted to shift said Wedges notonly to contact with the flask but also to lift it, a stop for saidy wedge actuating mechanism limiting the movement of the wedges, and provisions for holding them in that position after taking the weight of the flask and contents.

3. An attachment for roll-over patterndrawing molding machines comprising iii Y combination complementary wedges adapted tho receive the flask and contents, a' lever linked tosaid Wedges, and a shoulder cooperating with said lever as the stop.

4. A roll-over pattern-drawing moldingV .machine provided with means Vfor taking,` the weight of a flask and its contents to relieve the machine from unbalanced loading prior to patternsdrawing.

WILFRED LEWIS. 

